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/**
* TrackerMap
* Copyright (C) 2021-2022 Iván Ávalos <avalos@disroot.org>, Henoch Ojeda <imhenoch@protonmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import SwiftUI
import Combine
import WhirlyGlobeMaplyComponent
import shared
struct BaseMapView: UIViewControllerRepresentable {
typealias UIViewControllerType = MaplyViewController
@Binding var mapLayer: MapLayer
var link: BaseMapLink
class Coordinator: NSObject, MaplyViewControllerDelegate {
var parent: BaseMapView
var uiViewController: MaplyViewController?
var loader: MaplyQuadImageLoader? = nil
// Source: https://stackoverflow.com/questions/65923718
var cancellable: AnyCancellable?
var link: BaseMapLink? {
didSet {
cancellable = link?.$action.sink(receiveValue: { action in
guard let action = action else {
return
}
self.uiViewController?.action(action)
})
}
}
init(_ uiViewController: BaseMapView) {
self.parent = uiViewController
}
func maplyViewController(_ viewC: MaplyViewController, didClick annotation: MaplyAnnotation) {
print("Clicked map! :D")
}
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
func makeUIViewController(context: Context) -> MaplyViewController {
let mapViewController = MaplyViewController(mapType: .typeFlat)
mapViewController.delegate = context.coordinator
let tileInfo = Utils.tileInfoFrom(layer: mapLayer)
mapViewController.setZoomLimits(minZoom: mapLayer.minZoom,
maxZoom: mapLayer.maxZoom)
let sampleParams = MaplySamplingParams()
sampleParams.coordSys = MaplySphericalMercator(webStandard: ())
sampleParams.coverPoles = true
sampleParams.edgeMatching = true
sampleParams.minZoom = tileInfo.minZoom
sampleParams.maxZoom = tileInfo.maxZoom
sampleParams.singleLevel = true
sampleParams.maxTiles = 25
let loader = MaplyQuadImageLoader(params: sampleParams, tileInfo: tileInfo, viewC: mapViewController)
loader?.baseDrawPriority = kMaplyImageLayerDrawPriorityDefault
loader?.imageFormat = .imageUShort565
context.coordinator.loader = loader
DispatchQueue.main.async {
let point = MaplyCoordinateMakeWithDegrees(-100.36, 23.191)
mapViewController.focusOn(point: point, height: 0.4, animated: false)
}
return mapViewController
}
func updateUIViewController(_ uiViewController: MaplyViewController, context: Context) {
context.coordinator.uiViewController = uiViewController
context.coordinator.link = link
// MARK: - Set map layer
context.coordinator.loader?.changeTileInfo(Utils.tileInfoFrom(layer: mapLayer))
uiViewController.setZoomLimits(minZoom: mapLayer.minZoom,
maxZoom: mapLayer.maxZoom)
}
static func dismantleUIViewController(_ uiViewController: MaplyViewController, coordinator: Coordinator) {
coordinator.loader?.shutdown()
uiViewController.teardown()
}
}
extension MaplyViewController {
enum Action {
case zoomIn
case zoomOut
}
func action(_ action: Action) {
DispatchQueue.main.async {
switch action {
case .zoomIn:
self.zoomIn()
case .zoomOut:
self.zoomOut()
}
}
}
func focusOn(point: MaplyCoordinate, height: Float = 0.0000264, animated: Bool = true) {
let z = max(height, getMinZoom())
if animated {
animate(toPosition: point, height: z, time: 0.2)
} else {
setPosition(point, height: z)
}
}
func zoomIn() {
let pos = getPosition()
let zoom = currentMapScale() / 2
focusOn(point: pos, height: height(forMapScale: zoom))
}
func zoomOut() {
let pos = getPosition()
let zoom = currentMapScale() * 2
focusOn(point: pos, height: height(forMapScale: zoom))
}
func setZoomLimits(minZoom: Int32, maxZoom: Int32) {
setZoomLimitsMin(
height(forMapScale: Float(truncating:
MapCalculus.companion.zoomLevelToScale(zoom: maxZoom)
?? MapCalculus.companion.zoomLevelToScale(zoom: 21)!
)),
max: height(forMapScale: Float(truncating:
MapCalculus.companion.zoomLevelToScale(zoom: minZoom)
?? MapCalculus.companion.zoomLevelToScale(zoom: 1)!
)))
}
}
// Source: https://stackoverflow.com/questions/65923718
class BaseMapLink: ObservableObject {
@Published var action: MaplyViewController.Action?
func zoomIn() {
action = .zoomIn
}
func zoomOut() {
action = .zoomOut
}
}
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